Adamite

:"This article is about the mineral, for the religious sect see Adamites."

Infobox mineral
name = Adamite
category
boxwidth =
boxbgcolor =



caption = Yellow-green adamite in limonite
formula = Zn2AsO4OH
molweight =
color = Yellow, green, rarely white, and occasionally purple
habit = Wedge-like prisms typically in druses and radiating clusters - also smooth botryoidal masses.
system = Orthorhombic; 2/m 2/m 2/m
twinning =
cleavage = perfect in two directions
fracture = conchoidal
mohs = 3.5
luster = adamantine
refractive = nα=1.708 - 1.722, nβ=1.742 - 1.744, nγ=1.763 - 1.773
opticalprop =
birefringence =
pleochroism =
streak = white to pale green
gravity = 4.4
melt =
fusibility =
diagnostic =
solubility =
diaphaneity =
other = Strongly fluoresces green in short and long UV light.

Adamite is a zinc arsenate hydroxide mineral, Zn2AsO4OH. It is a mineral that typically occurs in the oxidized or weathered zone above zinc ore occurrences. Adamite is usually yellow in color, but tints of green occur due to inclusion of copper substitutions in the mineral structure. Olivenite is a copper arsenate that is isostructural with adamite and there is considerable substitution between zinc and copper resulting in an intermediate called "cuproadamite". Manganese, cobalt, and nickel also substitute in the structure. An analogous zinc phosphate, "tarbuttite", is known.

The yellow to bright lime-green colored crystals and druze along with its distinctive fluorescence make adamite a favorite among mineral collectors. Found in Mapimi, Mexico; Greece; and California and Utah in the United States.

Adamite was named after the French mineralogist Gilbert Joseph Adam (1795-1881). The type locality is in the Atacama Desert in Chile.

ee also

* A list of minerals with associated Wikipedia articles
* A comprehensive list of minerals
* List of minerals named after people

References

* [http://www.mindat.org/min-21.html Mindat.org]
* [http://webmineral.com/data/Adamite.shtml Webmineral.com]
* [http://mineral.galleries.com/minerals/phosphat/adamite/adamite.htm Mineral galleries]


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Look at other dictionaries:

  • adamite — ● adamite nom féminin Arséniate naturel de zinc hydraté, de symétrie orthorhombique. ⇒ADAMITE, ADAMIEN, IENNE, adj. et subst. A. Adjectif 1. Qui a l aspect primitif et innocent du temps d Adam : • 1. Les Lépreux. Chaque matin, dès que les ramées… …   Encyclopédie Universelle

  • Adamite — Ad am*ite, n. [From Adam.] 1. A descendant of Adam; a human being. [1913 Webster] 2. (Eccl. Hist.) One of a sect of visionaries, who, professing to imitate the state of Adam, discarded the use of dress in their assemblies. [1913 Webster] …   The Collaborative International Dictionary of English

  • Adamite — (n.) human being, descendant of Adam the Biblical first man, 1630s, from ADAM (Cf. Adam) + ITE (Cf. ite). Used from 1620s of sects or groups that practice nudism, in reference to the state of Adam before the Fall …   Etymology dictionary

  • Adamite — [ad′əm īt΄] n. 1. a human being; person thought of as descended from Adam 2. a person who goes naked in imitation of Adam, as did members of some early religious sects Adamitic [ad′əmit′ik] adj …   English World dictionary

  • Adamite — Cette page d’homonymie répertorie les différents sujets et articles partageant un même nom. Adamite ou adamique se rapporte à Adam, dont le nom signifie homme en hébreu. L adamite est un minéral composé d arséniate de zinc de formule Zn2OHAsO4.… …   Wikipédia en Français

  • Adamite — Adamitic /ad euh mit ik/, Adamitical, adj. /ad euh muyt /, n. 1. a descendant of Adam; human being. 2. a nudist. [1620 30; ADAM + ITE1] * * * …   Universalium

  • adamite — noun a) A descendant of Adam; a human being. b) One of a sect of visionaries, who, professing to imitate the state of Adam, discarded the use of dress in their assemblies …   Wiktionary

  • adamite — (a da mi t ) s. m. Membre d une secte qui, prétendant se conformer à Adam, rejetait l usage des vêtements. ÉTYMOLOGIE    Adam …   Dictionnaire de la Langue Française d'Émile Littré

  • Adamite — n. descendant of Adam; person, human; nudist; member of a visionaries sect who imitate the state of Adam and prefer to walk around naked; type of green fluorescent mineral …   English contemporary dictionary

  • Adamite — ♦ Member of a heretical religious current that sought to return mankind to Adam s original state in paradise. (Fine, John V.A. Jr. The Late Medieval Balkans, 621) …   Medieval glossary


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